0x04: 8 ch Taguchi terminal connector

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Background

Please see the e-nose project page for an elaborate description as well as practical examples.

Function

This PCB connects to an eight channel Taguchi gas sensor array (see design 0x00) and breaks out sensor excitation voltages (heater voltages, VH) and sensor voltages across load resistors on the sensor array (VRL). This way you can connect the Taguchi array to a data acquisition system like for instance the NI USB-6008 or an external Raspberry Pi interface board and analyse measurement data in in your preferred software environment.

License terms
The 0x04 design is published under the Creative Commons Unported 3.0 License.  I do not profit from this design, neither should you. You are welcome to adapt, modify, and redistribute this design as long as the license terms are respected.

Physical size of PCB

100 mm (length) by 50 mm (width). Double-sided.

Rendering and photos

DipTrace 3D rendering, frontside without components

 

DipTrace 3D rendering, frontside with components

 

Photo of an assembled 8-ch electronic nose system

 

Photo of an assembled 8-ch electronic nose system with a Raspberry Pi Zero interface board

 

 

Bill of materials

8 pcs. 1-pin double row pin header

8 pcs. sensor guard resistor, 715R, form factor 1206

2 pcs. 10-way IDC connector

1 (2) pcs. 2-way screw terminal, 5.08 mm pitch

 

optional

2 pcs. 8-way DIP-switch

8 pcs. potentiometer, 50k, form factor 3296W

9 pcs. LED, form factor 1206

9 pcs. current limiting resistor, 1k, form factor 1206

1 pcs. ceramic decoupling capacitor, 100 nF, form factor 1206

 

Estimated cost

Headers, IDC connectors, DIP switches, LEDs, resistors, and potentiometers should not cost more than EUR 4,-.

Downloads

Schematic (PDF): 0x04rev1-schematic

DipTrace schematic file: 0x04rev1-schematic

DipTrace v. 3 PCB design file: 0x04rev1-ratlined-public

Gerber files: 0x04rev1

Links

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